A transfer function approach to studying the size-of-source and distance effects in radiation thermometry

In this work, a model based on the transfer function approach of the propagation of radiation through several apertures and optical components is presented. This transfer function formalism offers the possibility of studying various measurement scenarios involving different source geometries, distances, and varying complexities of the optics of the radiation thermometer. The impact of different types of source geometries, and the variation of source-thermometer distance are investigated using the above model. Simulation results and experimental validation are presented.